Sir Martin Sorrell’s S4 Capital ups 2021 outlook

S4 Capital, the digital advertising agency run by Sir Martin Sorrell, has upped its full-year revenues outlook after surging first-quarter sales (Aaron Chown/PA)
S4 Capital, the digital advertising agency run by Sir Martin Sorrell, has upped its full-year revenues outlook after surging first-quarter sales (Aaron Chown/PA)